pcep/ietf-stateful07/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful07/Stateful07LspObjectParser.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.protocol.pcep.ietf.stateful07;
   9
  10 import java.util.BitSet;
  11
  12 import org.opendaylight.protocol.pcep.spi.AbstractObjectWithTlvsParser;
  13 import org.opendaylight.protocol.pcep.spi.ObjectUtil;
  14 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.spi.TlvHandlerRegistry;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.OperationalStatus;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.PlspId;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.error.code.tlv.LspErrorCode;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.LspIdentifiers;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.object.Lsp;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.object.LspBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.object.lsp.Tlvs;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.object.lsp.TlvsBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.rsvp.error.spec.tlv.RsvpErrorSpec;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.symbolic.path.name.tlv.SymbolicPathName;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  30
  31 import com.google.common.base.Preconditions;
  32
  33 /**
  34  * Parser for {@link Lsp}
  35  */
  36 public class Stateful07LspObjectParser extends AbstractObjectWithTlvsParser<TlvsBuilder> {
  37
  38         public static final int CLASS = 32;
  39
  40         public static final int TYPE = 1;
  41
  42         /*
  43          * offset of TLVs offset of other fields are not defined as constants
  44          * because of non-standard mapping of bits
  45          */
  46         protected static final int TLVS_OFFSET = 4;
  47
  48         /*
  49          * 12b extended to 16b so first 4b are restricted (belongs to LSP ID)
  50          */
  51         protected static final int DELEGATE_FLAG_OFFSET = 15;
  52         protected static final int SYNC_FLAG_OFFSET = 14;
  53         protected static final int REMOVE_FLAG_OFFSET = 13;
  54         protected static final int ADMINISTRATIVE_FLAG_OFFSET = 12;
  55         protected static final int OPERATIONAL_OFFSET = 9;
  56
  57         public Stateful07LspObjectParser(final TlvHandlerRegistry tlvReg) {
  58                 super(tlvReg);
  59         }
  60
  61         @Override
  62         public Lsp parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException {
  63                 if (bytes == null || bytes.length == 0) {
  64                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  65                 }
  66                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, 2, 2));
  67
  68                 final LspBuilder builder = new LspBuilder();
  69                 builder.setIgnore(header.isIgnore());
  70                 builder.setProcessingRule(header.isProcessingRule());
  71
  72                 builder.setPlspId(new PlspId((ByteArray.bytesToLong(ByteArray.subByte(bytes, 0, 2)) & 0xFFFF) << 4 | (bytes[2] & 0xFF) >> 4));
  73                 builder.setDelegate(flags.get(DELEGATE_FLAG_OFFSET));
  74                 builder.setSync(flags.get(SYNC_FLAG_OFFSET));
  75                 builder.setRemove(flags.get(REMOVE_FLAG_OFFSET));
  76                 builder.setAdministrative(flags.get(ADMINISTRATIVE_FLAG_OFFSET));
  77                 short s = 0;
  78                 s |= flags.get(OPERATIONAL_OFFSET + 2) ? 1 : 0;
  79                 s |= (flags.get(OPERATIONAL_OFFSET + 1) ? 1 : 0) << 1;
  80                 s |= (flags.get(OPERATIONAL_OFFSET) ? 1 : 0) << 2;
  81                 builder.setOperational(OperationalStatus.forValue(s));
  82                 final TlvsBuilder b = new TlvsBuilder();
  83                 parseTlvs(b, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  84                 builder.setTlvs(b.build());
  85                 return builder.build();
  86         }
  87
  88         @Override
  89         public void addTlv(final TlvsBuilder builder, final Tlv tlv) {
  90                 if (tlv instanceof LspErrorCode) {
  91                         builder.setLspErrorCode((LspErrorCode) tlv);
  92                 } else if (tlv instanceof LspIdentifiers) {
  93                         builder.setLspIdentifiers((LspIdentifiers) tlv);
  94                 } else if (tlv instanceof RsvpErrorSpec) {
  95                         builder.setRsvpErrorSpec((RsvpErrorSpec) tlv);
  96                 } else if (tlv instanceof SymbolicPathName) {
  97                         builder.setSymbolicPathName((SymbolicPathName) tlv);
  98                 }
  99         }
 100
 101         @Override
 102         public byte[] serializeObject(final Object object) {
 103                 if (!(object instanceof Lsp)) {
 104                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed LspObject.");
 105                 }
 106                 final Lsp specObj = (Lsp) object;
 107
 108                 final byte[] tlvs = serializeTlvs(specObj.getTlvs());
 109                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length + getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
 110
 111                 Preconditions.checkArgument(specObj.getPlspId() != null, "PLSP-ID not present");
 112                 final int lspID = specObj.getPlspId().getValue().intValue();
 113                 retBytes[0] = (byte) (lspID >> 12);
 114                 retBytes[1] = (byte) (lspID >> 4);
 115                 retBytes[2] = (byte) (lspID << 4);
 116                 if (specObj.isDelegate() != null && specObj.isDelegate()) {
 117                         retBytes[3] |= 1 << (Byte.SIZE - (DELEGATE_FLAG_OFFSET - Byte.SIZE) - 1);
 118                 }
 119                 if (specObj.isRemove() != null && specObj.isRemove()) {
 120                         retBytes[3] |= 1 << (Byte.SIZE - (REMOVE_FLAG_OFFSET - Byte.SIZE) - 1);
 121                 }
 122                 if (specObj.isSync() != null && specObj.isSync()) {
 123                         retBytes[3] |= 1 << (Byte.SIZE - (SYNC_FLAG_OFFSET - Byte.SIZE) - 1);
 124                 }
 125                 if (specObj.isAdministrative() != null && specObj.isAdministrative()) {
 126                         retBytes[3] |= 1 << (Byte.SIZE - (ADMINISTRATIVE_FLAG_OFFSET - Byte.SIZE) - 1);
 127                 }
 128                 if (specObj.getOperational() != null) {
 129                         final int op = specObj.getOperational().getIntValue();
 130                         retBytes[3] |= (op & 7) << 4;
 131                 }
 132                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 133                 return ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), retBytes);
 134         }
 135
 136         public byte[] serializeTlvs(final Tlvs tlvs) {
 137                 if (tlvs == null) {
 138                         return new byte[0];
 139                 }
 140                 int finalLength = 0;
 141                 byte[] lspErrBytes = null;
 142                 byte[] lspIdBytes = null;
 143                 byte[] rsvpErrBytes = null;
 144                 byte[] symbBytes = null;
 145                 if (tlvs.getLspErrorCode() != null) {
 146                         lspErrBytes = serializeTlv(tlvs.getLspErrorCode());
 147                         finalLength += lspErrBytes.length;
 148                 }
 149                 if (tlvs.getLspIdentifiers() != null) {
 150                         lspIdBytes = serializeTlv(tlvs.getLspIdentifiers());
 151                         finalLength += lspIdBytes.length;
 152                 }
 153                 if (tlvs.getRsvpErrorSpec() != null) {
 154                         rsvpErrBytes = serializeTlv(tlvs.getRsvpErrorSpec());
 155                         finalLength += rsvpErrBytes.length;
 156                 }
 157                 if (tlvs.getSymbolicPathName() != null) {
 158                         symbBytes = serializeTlv(tlvs.getSymbolicPathName());
 159                         finalLength += symbBytes.length;
 160                 }
 161                 int offset = 0;
 162                 final byte[] result = new byte[finalLength];
 163                 if (lspErrBytes != null) {
 164                         ByteArray.copyWhole(lspErrBytes, result, offset);
 165                         offset += lspErrBytes.length;
 166                 }
 167                 if (lspIdBytes != null) {
 168                         ByteArray.copyWhole(lspIdBytes, result, offset);
 169                         offset += lspIdBytes.length;
 170                 }
 171                 if (rsvpErrBytes != null) {
 172                         ByteArray.copyWhole(rsvpErrBytes, result, offset);
 173                         offset += rsvpErrBytes.length;
 174                 }
 175                 if (symbBytes != null) {
 176                         ByteArray.copyWhole(symbBytes, result, offset);
 177                         offset += symbBytes.length;
 178                 }
 179                 return result;
 180         }
 181
 182         @Override
 183         public int getObjectType() {
 184                 return TYPE;
 185         }
 186
 187         @Override
 188         public int getObjectClass() {
 189                 return CLASS;
 190         }
 191 }